SAP MDG : Rules and validations issue

Hi Masters,

For vendor master, I have 3 levels of approvals.

In 2nd approval FI role comes and approvar can view the finance data and company code details.Some times approvar is missing the company code data, which is needs to be filled.

So here I have requirement to validate the comapny code data if not stop the process. I tried throgh BRF+, can you please help me in this requriement.

Thanks

Bala